Platform Pro Settings and Layout Editor Frozen?

Today everything was fine, but this evening when I go to the pagelines area on my dashboard the area where I can usually add or remove elements from a certain part of the page look slightly different and don't change when I click from section to section, though the browser tells me that the page is done loading.
This has all worked perfectly until this point- I don't know what to do. Any help would be appreciated.

I had similar problems with my layout editor frozen. I disabled "videojs Pro" from plugins and that did the trick.
Which plugin would you recommend for adding a video (vimeo) to a page? Also a music player.
Thanks,
Mark